SILENT-WINGED OWLS OF NORTH A^IERICA 



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© National Geographic Sociuty 



MUCH OF THEIR FORAGING IS DONE IN DAYLIGHT 

 Because true night is shortened or absent in the northern summer range of the great gray 

 rtonf and the snowy owl, they must perforce hunt for hares, mice, and birds during dayhght. 

 BothVr"Lownas winter residents m northern Umted States. Foohsh crows have been seen 

 mobbin- the supposedly sun-blinded snowy owl, only to meet swift deadr m a rush ot sdent wings 

 and unerr g claws. The comparatively rare great gray, clothed in Huffy feathers, measures the 

 largest of North American owls, though less powerful than its snowy companion. 



